Alert archive / Minnesota / Mesoscale Discussions in 2018

Mesoscale Discussion 1364

August 26, 20184 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2018, 5:14 PM CDT for 4 counties in Minnesota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Aug 26, 2018, 5:14 PM CDT (22:14 UTC)
Expired
Aug 26, 2018, 7:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Crow Wing County, MN

The radar

The Duluth radar (KDLH), 66 km from the middle of the area, began a volume at 22:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 10.2 hours before the alert went out and 196 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 12:00Z on 2018-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 12:00Z on 2018-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1357 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 10:08 PM CDTMesoscale DiscussionSPCBecker, Clay, Douglas, Mahnomen, Norman, Otter Tail and 2 more97 min
Aug 26, 2:46 AM CDTMesoscale DiscussionSPCBecker, Benton, Clay, Crow Wing, Douglas, Kanabec and 6 more2 hr
Aug 26, 9:53 AM CDTMesoscale DiscussionSPCJackson, Nobles2 hr
Aug 26, 11:56 AM CDTMesoscale DiscussionSPCBecker, Cass, Clay, Crow Wing, Douglas, Grant and 6 more109 min
Aug 26, 1:42 PM CDTMesoscale DiscussionSPCBig Stone, Grant, Lac qui Parle, Stevens, Traverse3 hr
Aug 26, 6:15 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Grant, Hubbard and 10 more3 hr

Nearby

Mesoscale Discussions in Minnesota, 2018Every mesoscale discussion in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.